eleven / messenger Public

web+native: a trailing reaction speaks in the chat list (#1418)

* web+native: a trailing reaction speaks in the chat list

When the newest event in a thread was an emoji reaction, the chat-list row
showed nothing under the name — blank on web (#520 made a trailing reaction
silent to stop it rendering as "James: " with nothing after) and blank-ish
on native, where previewText saw a payload with no text.

Say what happened instead: "James reacted 👍 to “buy milk”" — a new pure
helper (format.js reactionLine + its Swift twin), called from previewText on
both platforms. It names the actor itself, so it returns before the group
prefix and never doubles up.

The quote comes from targetText, a replySnippet of the reacted-to message
that the reacting client stamps inside the ciphertext — the same trick
targetUid already uses. The row is built from the thread's last_blob alone,
so there is nothing local to look the target up in for a thread this device
has never opened. Reactions that predate it (i.e. everything already stored)
fall back to the bare "James reacted 👍".

Un-reacts speak too: on reload that event is all the list has, so silence
would mean the row said one thing live and another after a refresh.

Reactions still never light the unread dot or fire a native notify.

Co-Authored-By: Claude <noreply@anthropic.com>

* web+native: stamp the reaction quote through the plain markdown projection

Quoting the reacted-to message raw would show the marks the bubble renders
as styling ("**buy** milk") and the composer's opt-out escapes as visible
backslashes — the rule previewText already states for every other preview
line. Projected at the stamp (chat.js toggleReaction, ChatFeedModel), so no
payload ever carries them.

Co-Authored-By: Claude <noreply@anthropic.com>

* native: resolve the reaction's actor by uid, not just the payload's name

On real data a reaction row often read "Someone reacted 😂": native took the
actor from the payload's `name` snapshot alone, and that field is EMPTY
whenever the reacting device had no screen name to stamp. The web never had
this — its previewText resolves by uid through nicknames/roster.

ThreadStore already holds displayLabels (my name for them, #577), the twin of
that resolution. Pass it in; the payload's name stays the fallback, and
"Someone" now only means nobody to resolve at all.

Co-Authored-By: Claude <noreply@anthropic.com>

---------

Co-authored-by: Claude <noreply@anthropic.com>

James Adam 2 months ago 9e24de6e9b82d80a8742676018ff3d5d9343b0fd parent 8b2b19f

13 files changed, +260 −27

changelog/2026-08-04-reaction-previews.md +5 −0
ios/LChatCore/Sources/LChatCore/AttachmentFormat.swift +18 −0
ios/LChatCore/Sources/LChatCore/ChatFeedModel.swift +10 −2
ios/LChatCore/Sources/LChatCore/Models.swift +17 −1
ios/LChatCore/Sources/LChatCore/ThreadStore.swift +6 −1
ios/LChatCore/Tests/LChatCoreTests/EventVectorTests.swift +10 −2
ios/LChatCore/Tests/LChatCoreTests/PreviewTextTests.swift +78 −0
test/event-vectors/chat.json +6 −2
test/format.test.mjs +34 −1
test/markdown.test.mjs +14 −0
web/static/apps/chat.js +11 −4
web/static/format.js +19 −0
web/static/shell.js +32 −14

diff --git a/changelog/2026-08-04-reaction-previews.md b/changelog/2026-08-04-reaction-previews.md

new file mode 100644

index 0000000..f51b521

--- /dev/null

+++ b/changelog/2026-08-04-reaction-previews.md

@@ -0,0 +1,5 @@

+🤖 **Reactions now show up in the chat list.** When the most recent thing in a

+chat was someone's emoji reaction, the chat list showed a blank line under the

+chat's name. It now says what happened — "James reacted 👍 to “can you grab

+milk?”" — so you can tell at a glance who reacted to what without opening the

+chat. Reactions still never mark a chat unread.

diff --git a/ios/LChatCore/Sources/LChatCore/AttachmentFormat.swift b/ios/LChatCore/Sources/LChatCore/AttachmentFormat.swift

index 2b15ab3..69e3ea3 100644

--- a/ios/LChatCore/Sources/LChatCore/AttachmentFormat.swift

+++ b/ios/LChatCore/Sources/LChatCore/AttachmentFormat.swift

@@ -64,6 +64,24 @@ public func replySnippet(_ payload: MessagePayload, max: Int = 140) -> String {

return ""

}

+/// format.js reactionLine: the sidebar line for a reaction event —

+/// "James reacted 👍 to “buy milk”". A reaction has no text of its own, so

+/// without this the row went blank. `who` is resolved by the caller so it can

+/// say "You"; the quoted snippet is the payload's `targetText`, absent on

+/// reactions from older clients (then the bare form stands on its own).

+public func reactionLine(_ who: String, _ payload: MessagePayload, max: Int = 40) -> String {

+ let actor = who.trimmingCharacters(in: .whitespaces).isEmpty ? "Someone" : who

+ let emoji = (payload.emoji ?? "").trimmingCharacters(in: .whitespaces)

+ // on == false is an un-react. It still speaks: on reload this event is all

+ // the list has, so silence here would mean a different row after a refresh.

+ let off = payload.on == false

+ let head = "\(actor) \(off ? "removed" : "reacted")" + (emoji.isEmpty ? "" : " \(emoji)")

+ var quoted = MessagePayload()

+ quoted.text = payload.targetText

+ let snip = replySnippet(quoted, max: max)

+ return snip.isEmpty ? head : "\(head) \(off ? "from" : "to") “\(snip)”"

/// format.js typingSummary: who's typing, as a subtle one-liner that never

/// grows unbounded past two names.

public func typingSummary(_ names: [String]) -> String {

diff --git a/ios/LChatCore/Sources/LChatCore/ChatFeedModel.swift b/ios/LChatCore/Sources/LChatCore/ChatFeedModel.swift

index 958b5f7..8e25e71 100644

--- a/ios/LChatCore/Sources/LChatCore/ChatFeedModel.swift

+++ b/ios/LChatCore/Sources/LChatCore/ChatFeedModel.swift

@@ -819,19 +819,27 @@ public final class ChatFeedModel: ObservableObject {

/// (type="reaction") sent as an ordinary message — the server never sees

/// the emoji or the target; every client folds the event into the target's

/// tally. targetUid (the reacted-to message's author) rides inside the

- /// ciphertext so push handlers can show the notification only to the author.

+ /// ciphertext so push handlers can show the notification only to the author;

+ /// targetText (its snippet) rides along so the sidebar can quote what was

+ /// reacted to without loading the thread.

public func toggleReaction(_ id: Int64, emoji: String) {

guard Self.allowedReactions.contains(emoji), key != nil,

let socket, socket.isLive,

let m = messages.first(where: { $0.id == id }) else { return }

let mine = m.reactions.first { $0.emoji == emoji }?.isMine ?? false

+ // The quote goes through the markdown plain projection, like every

+ // other preview line — raw text would show the marks the bubble renders

+ // as styling. Projected at the stamp, so no payload carries them.

+ var quoted = m.raw

+ quoted.text = markdownPlainText(m.raw.text ?? "")

var payload = MessagePayload(type: "reaction",

name: instance.screenName,

ts: Int64(Date().timeIntervalSince1970 * 1000),

targetSid: id,

targetUid: m.raw.uid,

emoji: emoji,

- on: !mine)

+ on: !mine,

+ targetText: replySnippet(quoted))

if !myUserId.isEmpty { payload.uid = myUserId }

encryptAndSend(payload, via: socket)

// Optimistic local fold so the chip responds instantly; the echo frame

diff --git a/ios/LChatCore/Sources/LChatCore/Models.swift b/ios/LChatCore/Sources/LChatCore/Models.swift

index 5901c8f..8a9c32d 100644

--- a/ios/LChatCore/Sources/LChatCore/Models.swift

+++ b/ios/LChatCore/Sources/LChatCore/Models.swift

@@ -175,6 +175,10 @@ public struct MessagePayload: Codable, Equatable, Sendable {

// only to the author; nil for legacy uid-less targets

public var emoji: String? // the reaction emoji

public var on: Bool? // true to add, false to remove

+ public var targetText: String? // a replySnippet of the reacted-to message, stamped by the

+ // reacting client (inside the ciphertext) so the sidebar can

+ // say "reacted 👍 to “buy milk”" for a thread built from

+ // last_blob alone; nil on reactions sent before this shipped

// Tamper-evidence gossip (docs/tamper-evidence.md, #573): the sender's

// verified checkpoint head, `[seqTo, chain]`, riding inside the encrypted

@@ -409,7 +413,19 @@ public struct ChatThread: Identifiable, Equatable, Codable {

// A one-line snippet for the sidebar: "Name: text" in groups, just text in DMs —

// mirrors previewText in web/static/chat.js.

-public func previewText(kind: String, payload: MessagePayload) -> String {

+public func previewText(kind: String, payload: MessagePayload, mine: Bool = false,

+ actor: String = "") -> String {

+ // A reaction event carries no text, so say what happened instead of

+ // rendering an empty row (web twin: the reaction branch in previewText).

+ // It names the actor itself, so it returns before the group prefix below.

+ // `actor` is the caller's by-uid resolution — my name for them (#577), the

+ // way the web resolves it; the payload's own `name` is only the fallback,

+ // and it is EMPTY whenever the reacting device had no screen name to stamp

+ // (which is what made these rows read "Someone reacted 👍").

+ if payload.isReactionEvent {

+ let who = actor.isEmpty ? (payload.name ?? "") : actor

+ return reactionLine(mine ? "You" : who, payload)

+ }

// Through the markdown plain projection, never raw: raw text leaks the

// composer's opt-out escapes as visible backslashes (\*lit\*), and shows

// the marks the bubble renders as styling.

diff --git a/ios/LChatCore/Sources/LChatCore/ThreadStore.swift b/ios/LChatCore/Sources/LChatCore/ThreadStore.swift

index f028f9b..e71dbfc 100644

--- a/ios/LChatCore/Sources/LChatCore/ThreadStore.swift

+++ b/ios/LChatCore/Sources/LChatCore/ThreadStore.swift

@@ -656,7 +656,12 @@ public final class ThreadStore: ObservableObject {

lastMine = n == rosterLabels[myUserId]

}

if p.isRenderableChat || p.isReactionEvent {

- preview = previewText(kind: t.kind, payload: p)

+ // displayLabels: my name for them (#577) — the same by-uid

+ // resolution the web's previewText does, so a reaction from

+ // a device that stamped no screen name still names its

+ // sender instead of "Someone".

+ let actor = p.uid.flatMap { displayLabels[$0] } ?? ""

+ preview = previewText(kind: t.kind, payload: p, mine: lastMine, actor: actor)

} else {

// An APP EVENT (docs/native-apps.md voice surfaces): the

// raw payload text is app data, not a sidebar line ("buy

diff --git a/ios/LChatCore/Tests/LChatCoreTests/EventVectorTests.swift b/ios/LChatCore/Tests/LChatCoreTests/EventVectorTests.swift

index f3c8ddf..ede0cc0 100644

--- a/ios/LChatCore/Tests/LChatCoreTests/EventVectorTests.swift

+++ b/ios/LChatCore/Tests/LChatCoreTests/EventVectorTests.swift

@@ -169,7 +169,8 @@ final class EventVectorTests: XCTestCase {

targetSid: 12345,

targetUid: "user-eve-1",

emoji: "👍",

- on: true

+ on: true,

+ targetText: "buy milk"

)

XCTAssertTrue(reactionAdd.isReactionEvent, "should be identified as a reaction event")

@@ -187,6 +188,11 @@ final class EventVectorTests: XCTestCase {

XCTAssertEqual(reactionAdd.targetUid, "user-eve-1")

XCTAssertNotEqual(reactionAdd.targetUid, reactionAdd.uid, "reactor and author differ in this vector")

+ // The sidebar-side contract: targetText is a snippet of the reacted-to

+ // message, stamped by the reacting client so the chat list can quote it

+ // from last_blob alone. The fold ignores it (see expected_fold_event).

+ XCTAssertEqual(reactionAdd.targetText, "buy milk", "targetText carries the reacted-to snippet")

let reactionRemove = MessagePayload(

type: "reaction",

uid: "user-bob-1",

@@ -199,12 +205,14 @@ final class EventVectorTests: XCTestCase {

targetSid: 12346,

targetUid: "user-eve-1",

emoji: "❤️",

- on: false

+ on: false,

+ targetText: "shipped it 🎉"

)

XCTAssertTrue(reactionRemove.isReactionEvent, "should be identified as a reaction event")

XCTAssertFalse(reactionRemove.on ?? true, "on should be false for removing")

XCTAssertEqual(reactionRemove.targetUid, "user-eve-1", "targetUid rides on removals too")

+ XCTAssertEqual(reactionRemove.targetText, "shipped it 🎉", "so does targetText — an un-react still speaks in the sidebar")

}

func testReactionFold() {

diff --git a/ios/LChatCore/Tests/LChatCoreTests/PreviewTextTests.swift b/ios/LChatCore/Tests/LChatCoreTests/PreviewTextTests.swift

index 5ab4dbc..fe7120f 100644

--- a/ios/LChatCore/Tests/LChatCoreTests/PreviewTextTests.swift

+++ b/ios/LChatCore/Tests/LChatCoreTests/PreviewTextTests.swift

@@ -58,4 +58,82 @@ final class PreviewTextTests: XCTestCase {

p.attachments = [att("report.docx", "application/msword")]

XCTAssertEqual(previewText(kind: "group", payload: p), "Ada: 📎 report.docx")

}

+ // A reaction has no text of its own — the row used to go blank (in a group,

+ // a bare "Ada: "). It says what happened instead, quoting the snippet the

+ // reacting client stamped inside the ciphertext. Web twin: reactionLine in

+ // format.js + the reaction branch in shell.js previewText.

+ private func reaction(_ name: String, _ emoji: String, on: Bool, target: String?) -> MessagePayload {

+ var p = MessagePayload()

+ p.type = "reaction"

+ p.name = name

+ p.emoji = emoji

+ p.on = on

+ p.targetSid = 12345

+ p.targetText = target

+ return p

+ }

+ func testReactionQuotesItsTarget() {

+ let p = reaction("Ada", "👍", on: true, target: "buy milk")

+ XCTAssertEqual(previewText(kind: "dm", payload: p), "Ada reacted 👍 to “buy milk”")

+ }

+ // It names the actor itself, so the group prefix never doubles up.

+ func testReactionTakesNoGroupPrefix() {

+ let p = reaction("Ada", "👍", on: true, target: "buy milk")

+ XCTAssertEqual(previewText(kind: "group", payload: p), "Ada reacted 👍 to “buy milk”")

+ }

+ func testMyOwnReactionSaysYou() {

+ let p = reaction("Ada", "🎉", on: true, target: "shipped it")

+ XCTAssertEqual(previewText(kind: "group", payload: p, mine: true), "You reacted 🎉 to “shipped it”")

+ }

+ // An un-react speaks too: on reload this event is all the sidebar has, so

+ // silence would mean a different row after a refresh than the one shown live.

+ func testUnReactSpeaks() {

+ let p = reaction("Bob", "❤️", on: false, target: "shipped it 🎉")

+ XCTAssertEqual(previewText(kind: "dm", payload: p), "Bob removed ❤️ from “shipped it 🎉”")

+ }

+ // Reactions from clients that predate targetText (and every reaction

+ // already in a database) carry no snippet — the bare form still reads.

+ func testReactionWithoutASnippet() {

+ XCTAssertEqual(previewText(kind: "dm", payload: reaction("Ada", "👍", on: true, target: nil)),

+ "Ada reacted 👍")

+ XCTAssertEqual(previewText(kind: "dm", payload: reaction("Ada", "👍", on: false, target: nil)),

+ "Ada removed 👍")

+ }

+ func testReactionQuoteIsClamped() {

+ let p = reaction("Ada", "👍", on: true, target: String(repeating: "a", count: 200))

+ let line = previewText(kind: "dm", payload: p)

+ XCTAssertTrue(line.hasPrefix("Ada reacted 👍 to “"))

+ XCTAssertTrue(line.hasSuffix("…”"))

+ XCTAssertLessThan(line.count, 70, "the sidebar line stays one line's worth")

+ }

+ // The caller resolves the actor by uid (ThreadStore's displayLabels — my

+ // name for them, #577), and that wins over the payload's snapshot. Without

+ // it, a reaction from a device that stamped no screen name — common on real

+ // data — reads "Someone reacted 👍".

+ func testActorResolvesByUidOverThePayloadName() {

+ var p = reaction("", "😂", on: true, target: nil)

+ p.name = ""

+ XCTAssertEqual(previewText(kind: "group", payload: p, actor: "Paul"), "Paul reacted 😂")

+ }

+ func testResolvedActorBeatsAStalePayloadName() {

+ let p = reaction("Old Name", "👍", on: true, target: "buy milk")

+ XCTAssertEqual(previewText(kind: "dm", payload: p, actor: "My Name For Them"),

+ "My Name For Them reacted 👍 to “buy milk”")

+ }

+ // Nobody to resolve (they left the space, and the payload named no one).

+ func testReactionWithoutANameSaysSomeone() {

+ var p = reaction("", "👍", on: true, target: "buy milk")

+ p.name = nil

+ XCTAssertEqual(previewText(kind: "dm", payload: p), "Someone reacted 👍 to “buy milk”")

+ }

}

diff --git a/test/event-vectors/chat.json b/test/event-vectors/chat.json

index a75e82a..c2933a7 100644

--- a/test/event-vectors/chat.json

+++ b/test/event-vectors/chat.json

@@ -324,6 +324,7 @@

"targetSid": 12345,

"targetUid": "user-eve-1",

"emoji": "👍",

+ "targetText": "buy milk",

"name": "Alice",

"uid": "user-alice-1",

"ts": 1700000010000,

@@ -346,10 +347,11 @@

"targetSid": 12345,

"targetUid": "user-eve-1",

"emoji": "👍",

+ "targetText": "buy milk",

"uid": "user-alice-1",

"on": true

- "note": "Reactions are encrypted events stored as messages. Clients decrypt and fold them into the target message's reactions array. Count and mine-flag are derived client-side from the accumulated reaction events. on=true adds the reaction; on=false removes it. The mine-flag is true if uid===me, false otherwise. targetUid is the reacted-to message's author, stamped by the reacting client so push handlers (sw.js, the iOS NSE) can show the notification only to the author; the fold ignores it. Omitted when the target is a legacy uid-less message — then no one is notified."

+ "note": "Reactions are encrypted events stored as messages. Clients decrypt and fold them into the target message's reactions array. Count and mine-flag are derived client-side from the accumulated reaction events. on=true adds the reaction; on=false removes it. The mine-flag is true if uid===me, false otherwise. targetUid is the reacted-to message's author, stamped by the reacting client so push handlers (sw.js, the iOS NSE) can show the notification only to the author; the fold ignores it. Omitted when the target is a legacy uid-less message — then no one is notified. targetText is a replySnippet of the reacted-to message, likewise stamped by the reacting client and likewise ignored by the fold: it exists so the chat list can say 'Alice reacted 👍 to “buy milk”' for a thread built from last_blob alone (format.js reactionLine / the Swift twin). Optional — reactions from clients that predate it carry none, and the line falls back to 'Alice reacted 👍'."

{

"name": "reaction_remove",

@@ -359,6 +361,7 @@

"targetSid": 12346,

"targetUid": "user-eve-1",

"emoji": "❤️",

+ "targetText": "shipped it 🎉",

"name": "Bob",

"uid": "user-bob-1",

"ts": 1700000015000,

@@ -381,10 +384,11 @@

"targetSid": 12346,

"targetUid": "user-eve-1",

"emoji": "❤️",

+ "targetText": "shipped it 🎉",

"uid": "user-bob-1",

"on": false

- "note": "Removal is signaled by on=false. Clients fold both add and remove into the target message's reaction array; the current state is derived by filtering for on=true and counting. Removals never notify anyone (push handlers suppress on=false)."

+ "note": "Removal is signaled by on=false. Clients fold both add and remove into the target message's reaction array; the current state is derived by filtering for on=true and counting. Removals never notify anyone (push handlers suppress on=false) — but they DO speak in the chat list ('Bob removed ❤️ from “shipped it 🎉”'), because on reload this event is all the list has to render the row from."

{

"name": "edit",

diff --git a/test/format.test.mjs b/test/format.test.mjs

index 5980410..8b5053b 100644

--- a/test/format.test.mjs

+++ b/test/format.test.mjs

@@ -1,6 +1,6 @@

// Tests for text formatting (link detection, file sizes). node test/format.test.mjs

import assert from "node:assert/strict";

-import { tokenizeText, richTokens, blockTokens, firstLink, formatBytes, replySnippet, emojiOnlyCount, typingSummary, autoGroupTitle, nameList, membershipLine, youtubeId, changelogParagraphs, formatCountdown } from "../web/static/format.js";

+import { tokenizeText, richTokens, blockTokens, firstLink, formatBytes, replySnippet, reactionLine, emojiOnlyCount, typingSummary, autoGroupTitle, nameList, membershipLine, youtubeId, changelogParagraphs, formatCountdown } from "../web/static/format.js";

import { emojify, emojiMatches } from "../web/static/emoji.js";

let failures = 0;

@@ -127,6 +127,39 @@ await test("replySnippet is empty for an empty message", () => {

assert.equal(replySnippet(null), "");

});

+await test("reactionLine quotes what was reacted to", () => {

+ assert.equal(

+ reactionLine("James", { type: "reaction", emoji: "👍", on: true, targetText: "buy milk" }),

+ "James reacted 👍 to “buy milk”",

+ );

+});

+await test("reactionLine speaks for an un-react too", () => {

+ // The list must say the same thing after a reload as it did live, and on

+ // reload the un-react event is all it has.

+ assert.equal(

+ reactionLine("James", { type: "reaction", emoji: "❤️", on: false, targetText: "shipped it" }),

+ "James removed ❤️ from “shipped it”",

+ );

+});

+await test("reactionLine falls back to the bare form without a snippet", () => {

+ // Reactions sent before targetText shipped — the primary path on rollout.

+ assert.equal(reactionLine("James", { type: "reaction", emoji: "👍", on: true }), "James reacted 👍");

+ assert.equal(reactionLine("James", { type: "reaction", emoji: "👍", on: false }), "James removed 👍");

+});

+await test("reactionLine clamps a long quote", () => {

+ const line = reactionLine("Jo", { emoji: "👍", on: true, targetText: "a".repeat(200) }, 10);

+ assert.ok(line.startsWith("Jo reacted 👍 to “"));

+ assert.ok(line.endsWith("…”"));

+});

+await test("reactionLine takes the caller's actor, including “You”", () => {

+ assert.equal(reactionLine("You", { emoji: "🎉", on: true, targetText: "hi" }), "You reacted 🎉 to “hi”");

+ assert.equal(reactionLine("", { emoji: "🎉", on: true }), "Someone reacted 🎉");

+});

await test("emojiOnlyCount counts 1–3 all-emoji messages", () => {

assert.equal(emojiOnlyCount("👍"), 1);

assert.equal(emojiOnlyCount("😀😂"), 2);

diff --git a/test/markdown.test.mjs b/test/markdown.test.mjs

index b5a6bce..2795b83 100644

--- a/test/markdown.test.mjs

+++ b/test/markdown.test.mjs

@@ -11,6 +11,7 @@ import { readFileSync } from "node:fs";

import { dirname, join } from "node:path";

import { fileURLToPath } from "node:url";

import { parseMessage, houseParser, plainText } from "../web/static/markdown.js";

+import { replySnippet } from "../web/static/format.js";

const __dirname = dirname(fileURLToPath(import.meta.url));

@@ -127,6 +128,19 @@ await test("link hrefs are never non-http(s)", () => {

walk(parseMessage("[a](data:text/html,x) [b](vbscript:x) [c](file:///etc) <ftp://x.com>"));

});

+// The reaction quote a chat-list row shows ("James reacted 👍 to “buy milk”")

+// is stamped at react time as replySnippet(plainText(text)) — the same plain

+// projection every other preview line uses. Pinned here because the stamp

+// itself lives in DOM code (chat.js toggleReaction, ChatFeedModel on native):

+// quoting raw text would show the marks the bubble renders as styling, and the

+// composer's opt-out escapes as visible backslashes.

+await test("a reaction quote is stamped through the plain projection", () => {

+ assert.equal(replySnippet({ text: plainText("**buy** milk") }), "buy milk");

+ assert.equal(replySnippet({ text: plainText("\\*lit\\*") }), "*lit*");

+ // No text (a photo someone reacted to) still labels itself.

+ assert.equal(replySnippet({ text: plainText(""), attachments: [{ type: "image/png" }] }), "📷 Photo");

+});

if (failures) {

console.error(`\nmarkdown: ${failures} test(s) failed`);

process.exit(1);

diff --git a/web/static/apps/chat.js b/web/static/apps/chat.js

index c6998d9..37417d2 100644

--- a/web/static/apps/chat.js

+++ b/web/static/apps/chat.js

@@ -25,7 +25,7 @@

import { defineApp, namespace, keyedList, runCommand, runAppMention, messageActionsFor, commandCatalog, buildLocalNotice, renderApp, deliverAnswer, cancelAnswer, setAnswerCancelledHook, parseMeCommand, defaultCommandFor, appChatReadOnly, setCommandPanelHost, notifyCommandPanel, motionOK } from "../apps.js";

import { replySnippet, formatBytes, emojiOnlyCount, firstLink, youtubeId, typingSummary } from "../format.js";

import { openLightbox } from "../lightbox.js";

-import { parseMessage, renderTree } from "../markdown.js";

+import { parseMessage, renderTree, plainText as mdPlainText } from "../markdown.js";

import { createComposer, adoptComposer, classicComposerPref, formatAsYouTypePref } from "../composer.js";

// The rich (ProseMirror) composer backend loads via a primed dynamic import —

@@ -45,7 +45,8 @@ import { decodeBlurhash } from "../blurhash.js";

// The host bridge: chat.js injects the pieces that are server mechanisms,

// key-holding machinery, or host state — the app never touches crypto/tokens.

-// react(threadId, sid, emoji, on) original react/unreact WS frames

+// react(threadId, sid, emoji, on, targetUid, targetText)

+// encrypted react/unreact event

// del(threadId, sid) original delete frame (server-verified)

// edit(threadId, sid, payload) re-encrypt + original edit frame

// loadBlob(threadId, att) → url fetch + decrypt an attachment blob

@@ -1469,9 +1470,15 @@ function toggleReaction(m, emoji, ctx) {

// Reactions are now encrypted events. Optimistically update local state, but

// if the send fails, revert on the next render. host.react is now async.

// m.uid (the reacted-to message's author) rides inside the encrypted payload

- // so push handlers can show the reaction only to the author.

+ // so push handlers can show the reaction only to the author; its snippet

+ // rides along too so the chat list can say what was reacted to.

+ // Through the markdown plain projection, like every other preview line —

+ // quoting raw text would show the marks the bubble renders as styling, and

+ // the composer's opt-out escapes as visible backslashes. Projected here, at

+ // the stamp, so no payload ever carries them.

const onVal = !mine;

- host.react(ctx.threadId, sid, emoji, onVal, m.uid || "").then((sent) => {

+ const quote = replySnippet({ ...m.raw, text: mdPlainText(m.raw.text || "") });

+ host.react(ctx.threadId, sid, emoji, onVal, m.uid || "", quote).then((sent) => {

if (!sent) {

if (onVal) myReactions.delete(key);

else myReactions.add(key);

diff --git a/web/static/format.js b/web/static/format.js

index 4465d20..e53dd03 100644

--- a/web/static/format.js

+++ b/web/static/format.js

@@ -244,6 +244,25 @@ export function replySnippet(payload, max = 140) {

return "";

}

+// The chat-list line for a reaction event — "James reacted 👍 to “buy milk”".

+// A reaction is an ordinary encrypted message, so it can be the newest thing in

+// a thread; before this the row simply went blank (previewText saw a payload

+// with no text). `who` is resolved by the caller, so it can say "You".

+// The quoted snippet rides inside the ciphertext as `targetText`, stamped by

+// the reacting client — reactions sent before that shipped (and by older

+// clients) carry none, so the bare "James reacted 👍" is the fallback, not an

+// error. Pure so both the sidebar and its tests can use it.

+export function reactionLine(who, payload, max = 40) {

+ const actor = String(who || "").trim() || "Someone";

+ const emoji = (payload && payload.emoji ? String(payload.emoji) : "").trim();

+ // on === false is an un-react. It still speaks: the list has to say the same

+ // thing after a reload as it did live, and on reload all we have is this event.

+ const off = !!payload && payload.on === false;

+ const head = `${actor} ${off ? "removed" : "reacted"}${emoji ? " " + emoji : ""}`;

+ const snip = replySnippet({ text: payload && payload.targetText }, max);

+ return snip ? `${head} ${off ? "from" : "to"} “${snip}”` : head;

// Counts the emoji in a message whose only content is emoji (plus whitespace),

// returning 0 for anything else. Used to render short all-emoji messages large

// and bubble-less (à la Messages). Grapheme-segmented so ZWJ families (👨‍👩‍👧‍👦),

diff --git a/web/static/shell.js b/web/static/shell.js

index 19018fc..f50df7f 100644

--- a/web/static/shell.js

+++ b/web/static/shell.js

@@ -48,7 +48,7 @@ import {

capAllows,

appReloadMessage,

} from "/static/ui.js";

-import { richTokens, blockTokens, firstLink, replySnippet, formatBytes, autoGroupTitle, nameList, membershipLine, emojiOnlyCount, youtubeId, relTime, formatCountdown } from "/static/format.js";

+import { richTokens, blockTokens, firstLink, replySnippet, reactionLine, formatBytes, autoGroupTitle, nameList, membershipLine, emojiOnlyCount, youtubeId, relTime, formatCountdown } from "/static/format.js";

import { emojify, emojiMatches } from "/static/emoji.js";

import { startBootScene, finishBootScene } from "/static/bootscene.js";

import { processImage, videoMeta } from "/static/media.js";

@@ -2372,9 +2372,10 @@ async function applyThreads(r) {

if (isAppType(payload.type)) {

const pv = appPreview(payload, { you: payload.uid && payload.uid === myUserId });

if (pv) threadPreview[t.id] = pv;

- } else if (payload.type !== "reaction") {

- // A trailing reaction event stays silent (like the live path) —

- // previewText would render it as "Name: " with nothing after.

+ } else {

+ // Anything else — a chat message, or a trailing reaction event, which

+ // previewText speaks as "James reacted 👍 to …" rather than the blank

+ // row it used to leave behind.

previewPayload[t.id] = payload;

threadPreview[t.id] = previewText(t, payload);

}

@@ -2653,6 +2654,14 @@ window.lchatPaletteRun = (kind, id) => {

// A one-line snippet for the chat list: "Name: text" in groups, just text in DMs.

function previewText(t, data) {

+ // The actor, resolved by uid like the bubble headers (#592) — my name for

+ // them, their current name, then the payload's snapshot. Both the reaction

+ // line and the group prefix below name them.

+ const who = (data.uid && displayNameFor(nicknames[data.uid], (roster.find((x) => x.user_id === data.uid) || {}).label)) || data.name;

+ // A reaction event: it has no text of its own, so say what happened —

+ // "James reacted 👍 to “buy milk”" (#520 left this blank). It names the

+ // actor itself, so it returns before the group prefix below.

+ if (data.type === "reaction") return reactionLine(data.uid && data.uid === myUserId ? "You" : who, data);

// Through the markdown plain projection, never raw: raw text leaks the

// composer's opt-out escapes as visible backslashes (\*lit\*), and shows

// the marks the bubble renders as styling.

@@ -2670,10 +2679,7 @@ function previewText(t, data) {

}

// An action line ("Alice waves") already names the actor — skip the group

- // prefix so it doesn't double up ("Alice: Alice waves"). The prefix resolves

- // by uid like the bubble headers (#592) — my name for them, their current

- // name, then the payload snapshot.

- const who = (data.uid && displayNameFor(nicknames[data.uid], (roster.find((x) => x.user_id === data.uid) || {}).label)) || data.name;

+ // prefix so it doesn't double up ("Alice: Alice waves").

return t.kind === "group" && who && !data.action ? `${who}: ${body}` : body;

}

@@ -5240,7 +5246,7 @@ setChatAppHost({

const t = threads.find((x) => x.id === threadId);

return !!t && t.kind === "self";

- react: async (threadId, targetSid, emoji, on, targetUid) => {

+ react: async (threadId, targetSid, emoji, on, targetUid, targetText) => {

const key = threadKeys[threadId];

if (!key || !ws || ws.readyState !== WebSocket.OPEN) return false;

const payload = {

@@ -5261,6 +5267,12 @@ setChatAppHost({

// author — the server never learns whose message it was. Absent for

// legacy uid-less messages (then no one is notified).

if (targetUid) payload.targetUid = targetUid;

+ // A snippet of the reacted-to message, likewise inside the ciphertext: the

+ // chat list needs it to say "reacted 👍 to “buy milk”" for a thread it has

+ // never opened (the row is built from last_blob alone, so there is nothing

+ // to look the target up in). A snapshot, like a reply quote's — it outlives

+ // an edit or a delete of the original.

+ if (targetText) payload.targetText = targetText;

try {

const blob = await encrypt(key, payload);

ws.send(JSON.stringify({ type: "msg", thread_id: threadId, blob }));

@@ -7717,15 +7729,21 @@ function connectWS() {

// Own echoes still compare (per-device split view) but don't count as peers.

takeGossip(payload, payload && payload.uid && payload.uid !== myUserId);

// A reaction event: fold it so the target bubble's chips update live, then

- // stop — reactions stay silent in the thread list (no preview, no unread

- // dot, no native notify), like the plaintext reaction frames they replace.

- // last_at still advances (the server counts the event as the thread's

- // latest message, so a reload would order the list the same way).

+ // stop — a reaction never lights the unread dot or fires a native notify

+ // (the author's own push says it instead). It DOES retitle the chat-list

+ // row ("James reacted 👍 to …"): the server counts the event as the

+ // thread's latest message, so last_at advances either way and a reload

+ // would render exactly this line — staying silent here would mean the list

+ // said one thing live and another after a refresh.

if (payload && payload.type === "reaction") {

foldHostEvent(tid, "chat", { type: "chat.reaction", targetSid: payload.targetSid, emoji: payload.emoji, uid: payload.uid, on: payload.on, ts: payload.ts });

if (tid === activeId) renderActiveSurfaces();

const rt = threads.find((x) => x.id === tid);

- if (rt) rt.last_at = msg.created_at || Math.floor(Date.now() / 1000);

+ if (rt) {

+ rt.last_at = msg.created_at || Math.floor(Date.now() / 1000);

+ previewPayload[tid] = payload;

+ threadPreview[tid] = previewText(rt, payload);

+ }

if (tid === activeId && document.hasFocus()) markThreadRead(tid);

renderThreadList();

return;